of brand ywine



UNITED STATES PATENT OFFICE.

G. D'. VEST, OF BRANDYVINE, DELAVARE, ASSIGNOR TO P. W'. NEEFUS, OF NEVvYORK, N. Y.

VALVE-MOTION OF OSCILLATING STEAM-ENGINES.

Specification of Letters Patent No. 23,519, dated April 5, 1859'.

To all whom it may concern.'

Be it known that I, GEORGE I). IVEST, of Brandywine Hundred, Newcastlecounty, State of Delaware, have invented a new 'Talve-lniotion forOscillating Engines; and I do hereby declare that the following is afull and exact description thereof, reference being` had to theaccompanying drawings and to the letters of reference marked thereon.

The drawings represent elevations of an oscillating cylinder and itscrank in different positions.

Figure l, shows the cylinder and crank at the center and my improvedattachment in such a position, as to give no mot-ion to the valves. Fig.2 represents cylinder and crank in two positions, and my attachment insuch a position, as to give the crank a motion in direction of thearrow. Fig. 3, shows the engine with an attachment for a lead. to thevalves, and my valve motion in a position to give the crank a reversedmotion. Fig. 4:, is a detached view of rock .shaft and its crankarms. Inall these tigures the frame of the engine is omitted.

The nature of my invention consists in providing an arch and anintermediate lever, to produce a quick and sudden motion in the valvesof the oscillating engine.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation.

A. represents an oscillating cylinder with its center of vibration at a.

b b are the valves. The stem of these valves is hinged to the upper endof a lever c on the side of the cylinder a which lever c turns on a studc fixed to cylinder c. The lower end of this lever c extends downwardbelow the fulcrum c to the center line of the cylinder a, where itenters with a pin the slot of an arch d. This arch (Z turns on a fulcrumd', and is made concentral with the center of vibration of cylinder cunless it is placed eccentric by lever e and connecting rod f. If arch(l is placed in a concentral position with c by lever c as shown in Fig.l7 it is evident7 it will impart no motion to the valves b andconsequently the engine will stop. But if arch Z is placed in aneccentric position by means of lever e F the engine will turn indirection of arrow, and the position of cylinder c shown in red lines inthe same figure illustrates how fastthe opening of the ports take placeas the crank has traveled a short distance only. If no lead wererequired it would be suiiicient to give arch d a stationary fulcrum atcl in the frame of the engine, butin order to give the valves a lead Ipropose to apply the well known device of 2 eccentrics and an arch asshown in Fig. 3, and connect this arrangement with arch d, by arock-shaft g which has its bearing in some convenient part of the f 'ameand contains a crank arm /i and z' on each end. To the upper end of arm/L I attach the fulcrum of arch CZ and the upper end of arm z' isprovided with a pin 7c, which enters the slot of arch Z.

Having thus fully described my invention what I claim therein and desireto secure by Letters Patent is- The combination of arch CZ and lever cfor the purpose and in the manner substantially as set forth.

GEORGE D. IVEST. Titnesses ALB H. HAAR, WM. PALMER.

